Repower 90hp with 150/175?

[serpa4]

Earlier this year I purchased a 2013 JC tritoon with a 90hp honda on the back. It does about 27mph. I was spoiled last year with a 2012 JC tritoon I bought new. It did 39.5-40mph on gps on the same model boat, just different motor, year, and 150hp Suzuki vice 90hp Honda. My old 2012 JC and new 2013 one both are tri toons with strakes and full underskin and 21' long. I had to sell 2012 last year for personal reasons. My newer 2013 (bought used this year) has a 90 Honda and it just doesn't cut it.

SO...regardless of legal stuff (thanks for not bringing it up) for over powering my 150hp rated boat..

I have about 4 options that I'm considering and researching.
Only 4 stroke, only 4-cylingers.
Suzuki 150 and 175hp. Both the same weight. I did love my 2012 Suzuki 150 before I sold the boat.
Yamaha 150/175/200 all the same weight, but I think 200 would be way too much. Beides, the Yamaha F200 is probably going to be way out of my price range, but still considering it. Going from 175hp yamaha to 200hp also requires a bump in fuel octane from 87 to 89. I think 200hp, cost to purchase, and 89 octane requirements are going to kill the yamaha for me.
Mercury 150 naturally aspirated or 175 verado.
If I go 150hp then I might as well go Honda since it's all the same controls (I believe!) So there isn't a real question about a Honda 150 vs. Yamaha 150, or Mercury 150.

I'm leaning towards a Suzuki 175 since it's the same weight as a 150.
Honda 150hp would be the simplest re-power since I have a Honda 90hp now, but they don't have a 175 in a 4 cylinder and the 6 cylinder is about 100lbs more.

My question is not about brand, but power.

1) You all think there is handling or structural issues with a 200hp Yamaha on my tritoon rated for 150hp? More is always better, but think it will be too much, if there is such a thing. I feel comfortable going only 25hp over, but 50hp over would be significant I think.
2) I think I'd prefer a 175 naturally aspirated over 175 supercharged. What are the pros and cons?

I want quiet, and fuel efficiency and then top speed. I don't care to race, but on long drives back to the marina, I'd like to open it up and get back fast.

[Bamaman]

You've just about covered the pro's and con's on your dialogue already.

1) You all think there is handling or structural issues with a 200hp Yamaha on my tritoon rated for 150hp? More is always better, but think it will be too much, if there is such a thing. I feel comfortable going only 25hp over, but 50hp over would be significant I think. I doubt there will be that much difference in a 200 Yamaha4 cylinder vs. a 150 hp--at least until you really throw the throttle to it. Right now, there is limited info and experience out there on this new engine. My question is whether it's worth $3K over the F150 (that's already @ 110% of posted hp)? The 200 hp seems to be good for about 3-4 mph. 50 hp more might prove a legal problem if you have an accident.

2) I think I'd prefer a 175 naturally aspirated over 175 supercharged. What are the pros and cons? There're relatively few four stoke 175's on the retail market which makes buyers go for 150 hp or 200 hp. I would try to avoid any supercharged engine as I keep boats for the long run, and I never want to have to pay $5K for another supercharger--plus labor. I like to keep my boats simple as possible in this high tech world.

[Capt Sully]

Me thinks you would want to stay within the legal limits posted for your boat. If something happens, law enforcement and a lawyer would hold you liable. So, is your need for speed worth that ?? Anyway enjoy your summer.

[rancherlee]

Being a Suzuki fanboy I'd probably go the Honda 150 route, by far the most simplistic route to take and will probably be the cheapest route. 175hp of just about every make will perform identical to the 150hp versions except give you an extra 2-3mph at most. Hondas 150 is a little low on displacement and the Suzuki and Mercury 150's are big cube motors.